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CVE-2026-25732

Zauberzeug Nicegui remote code execution

7.5 HIGHPublic exploitEPSS 3.28%
  1. Published6 Feb 2026

Description

NiceGUI is a Python-based UI framework. Prior to 3.7.0, NiceGUI's FileUpload.name property exposes client-supplied filename metadata without sanitization, enabling path traversal when developers use the pattern UPLOAD_DIR / file.name. Malicious filenames containing ../ sequences allow attackers to write files outside intended directories, with potential for remote code execution through application file overwrites in vulnerable deployment patterns. This design creates a prevalent security footgun affecting applications following common community patterns. Note: Exploitation requires application code incorporating file.name into filesystem paths without sanitization. Applications using fixed paths, generated filenames, or explicit sanitization are not affected. This vulnerability is fixed in 3.7.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Zauberzeug Nicegui< 3.7.0

Remediation

Fixed in
Zauberzeug Nicegui≥ 3.7.0

References

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Frequently asked

Is CVE-2026-25732 being actively exploited?

CVE-2026-25732 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 3.28%.

How severe is CVE-2026-25732?

CVE-2026-25732 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 3.28% probability of exploitation.

Which products are affected by CVE-2026-25732?

Affected products include Zauberzeug Nicegui.

How do I fix CVE-2026-25732?

Upgrade affected software to a fixed version, for example Zauberzeug Nicegui 3.7.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25732 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.